Research Activities, January 2014

AHRQ Stats

AHRQ Stats.

Most common causes of hospital adverse drug events

In 2011, the most common causes of adverse drug events originating during a hospital stay were steroids, antibiotics, opiates/narcotics, and anticoagulants. (Source: AHRQ Healthcare Cost and Utilization Project Statistical Brief #164: Characteristics of Adverse Drug Events Originating During the Hospital Stay, 2011, available at

Top outpatient prescription drugs for adults

About one-third of the U.S. adult population purchased anticonvulsants, analgesics, and other drugs for central nervous system conditions in 2010. (Source: AHRQ Medical Expenditure Panel Survey Statistical Brief #410: Expenditures for the Top Five Therapeutic Classes of Outpatient Prescription Drugs, Adults Age 18 and Older, U.S. Civilian Noninstitutionalized Population, 2010, available at

Potentially preventable hospital admissions decline

The total number of potentially preventable hospital admissions for adults and children decreased by 6.2 percent and nearly 40 percent, respectively, between 2005 and 2010. The corresponding total hospital costs for adult and pediatric conditions decreased 2 percent and 32 percent, respectively. (Source: AHRQ Healthcare Cost and Utilization Project Statistical Brief #151: Trends in Potentially Preventable Hospital Admissions Among Adults and Children, 2005–2010, which is available at

Page last reviewed January 2014
Internet Citation: AHRQ Stats. January 2014. Agency for Healthcare Research and Quality, Rockville, MD.